How to get data based on value from firebase database

Fajar Syairillah :

i'm trying to get the data based on "Payments" in child "State" in my structured data My Structured firebase

I used this

salesRef = FirebaseDatabase.getInstance().getReference()
                .child("Orders")
                .orderByKey().startAt("Payments").endAt("Payments"+"\uf8ff");

but i got nothing back.What was wrong ? What should i use?

Peter Haddad :

You need to do the following:

salesRef = FirebaseDatabase.getInstance().getReference().child("Orders").orderByChild("state").equalTo("Waiting Payments Config");

orderByChild will take the name of an attribute as an argument and, equalTo will take the value of that attribute as an argument.

Check the docs:

https://firebase.google.com/docs/database/android/lists-of-data